Ystarn, n. a packsaddle, a saddle
Ystarnwr, n. a saddler
Ystefaig, n. the palate
Ysteinio, v. to cause a spread
Ystel, n. what stretches out
Ystelc, n. a lurk; a loiter
Ystelciad, n. lurking; a loitering
Ystelcian, v. to lurk; to loiter
Ystellff, n. a blockhead
Ystellffu, v. to render rigid